<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
       <button v-on:click="show()">按钮</button>
       <button @click="show()">按钮</button>
       <input type="text" @keydown.enter="test">
    </div>

    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>
        let vm = new Vue({
            el : '#app',
            data :{
               
            },
            methods:{
                show(){
                    alert(100);
                },
                test(){
                    alert(200);
                }
            }
        });
    </script> 
</body>
</html>